QNAP TS-EC1680U-RP ユーザーズマニュアル

Space reclaim complements thin provisioning so storage can be 
recovered and used for other NAS applications. Normally when data 
is deleted in a volume the storage capacity cannot be transferred 
back to the overall storage pool. But with space reclaim, space can be  
recovered and allocated back to the overall storage pool. This provides 
a much more efficient space usage.

Pre-allocate storage to give the appearance of having 
more capacity than actually available. This allows you to 
consume storage on demand as data is written to disk, 
instead of having capacity ahead of time.

In addition to storing data, the QNAP Flexible Volume can be 
utilized as an iSCSI LUN at the same time. The block-based 
iSCSI LUN provides less overhead which improves the overall 
read/write performance. The block-based iSCSI LUN takes 
advantages of Flexible Volume such as thin-provisioning LUN 
with Space Reclaim and online capacity expansion.

An alert can be created once a LUN or volume reaches a 
particular threshold size with email and SMS notifications. 
This prevents the storage or volume from running out of 
space, and the administrator can add more storage space or 
expand an existing volume if necessary.

Increase the capacity size of the LUNs, volumes, and 
storage pools on the fly. The Turbo NAS allows you to add 
more hard drives to increase the storage capacity of the 
storage pool on demand. The LUN and volumes can also 
be expanded online without interrupting the services.

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